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Engineering single-atom dynamics with electron irradiation

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DOI

  • Cong Su, Massachusetts Institute of Technology
  • ,
  • Mukesh Tripathi, University of Vienna
  • ,
  • Qing Bo Yan, University of Chinese Academy of Sciences
  • ,
  • Zegao Wang, College of Materials Science and Engineering, Sichuan University
  • ,
  • Zihan Zhang, University of Chinese Academy of Sciences
  • ,
  • Christoph Hofer, University of Vienna
  • ,
  • Haozhe Wang, Massachusetts Institute of Technology
  • ,
  • Leonardo Basile, Escuela Politécnica Nacional
  • ,
  • Gang Su, University of Chinese Academy of Sciences
  • ,
  • Mingdong Dong
  • Jannik C. Meyer, University of Vienna
  • ,
  • Jani Kotakoski, University of Vienna
  • ,
  • Jing Kong, Massachusetts Institute of Technology
  • ,
  • Juan Carlos Idrobo, Oak Ridge National Laboratory
  • ,
  • Toma Susi, University of Vienna
  • ,
  • Ju Li, Massachusetts Institute of Technology

Atomic engineering is envisioned to involve selectively inducing the desired dynamics of single atoms and combining these steps for larger-scale assemblies. Here, we focus on the first part by surveying the single-step dynamics of graphene dopants, primarily phosphorus, caused by electron irradiation both in experiment and simulation, and develop a theory for describing the probabilities of competing configurational outcomes depending on the postcollision momentum vector of the primary knock-on atom. The predicted branching ratio of configurational transformations agrees well with our atomically resolved experiments. This suggests a way for biasing the dynamics toward desired outcomes, paving the road for designing and further upscaling atomic engineering using electron irradiation.

Original languageEnglish
Article numbereaav2252
JournalScience Advances
Volume5
Issue5
ISSN2375-2548
DOIs
Publication statusPublished - May 2019

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